SmoothWaterMan

Call this a question from Nicky New-Guy, but I recently became re-addicted to sport-bike riding, and I'm looking forward to getting some coaching on my riding skills. So, while it might seem obvious, what is the actual (real?) reason that one lays the puck down and drags a knee? Is it for a better sense of the degree of lean? A helpful 3rd point if you start to lose tire grip? Understanding the philosophy will help me focus on the goals. Thanks, Peter.